Pay telephone station



1937. v R. D. COLLINS ET AL I 2,066,392

PAY TELEPHONE STAT ION Filed Nov. 50, 1931 6 Sheets-Sheet l Inventors Jan. 5, 1937-.

R. D. COLLINS ET AL PAY TELEPHONE STATION Filed Nov. 50, 1931 6 Sheets-@Sheet 2 QQWm [ywentom A'itumey-Si PAY TELEPHONE STATION Filed Nov. 30, 1951 6 Sheets-Sheet 5 Inventors A ltnmeys Jan. 5, 1937. R. D. COLLINS ET AL 2,066,392

PAY TELEPHONE STATION I Filed Nov. 50, 1931 6 Sheets-Sheet 4 Inventors 1937- R. D. COLLINS ET AL 2,066,392

PAY TELEPHONE STATION Fil ed Nov. 30, 1931. 6 Sheets-Sheet 5 I w w 1 W i i {45 J5/% 1 141 A Inventor; 47 g aka/2w AllarmyJ m- R. D. COLLINS ET AL 2,066,392

PAY TELEPHONE STATION Filed Ndv. 50, 1951 6 Sheets-Sheet 6 Inventors a By 5 5.

Patented Jan. 5, 1937 UNITED STATES PATENT OFFICE PAY TELEPHONE STATION Application November 30, 1931, Serial No. 578,060 10 Claims. (01. 17 96.3)

Our invention relates to pay telephone stations and has particular reference to a pay telephone station adapted for the automatic stationselecting telephones. In connection with pay station telephones, several problems are presented in connection with the automatic station-selecting telephones which are not presented in the systems using manual station-selecting systems, in which a telephone exchange operator selects the called station and has control over the calling station to either collect or refund the coin, depending upon whether or not the call is completed.

For example, the dial selecting or automatic station-selecting phones must be rendered operative by the initial coin to permit the dialing or selecting of the desired called station, and must be adapted to return the coin in the event that the station called is busy or fails to answer, while, at the same time, the station must be adapted to collect the coin in the event of completion of the call.

011 the other hand, such stations must be adapted to permit conversation upon an incoming call, that is, when another station on the system is calling the pay station. Thus, the telephone station must be adapted to receive incoming calls without the necessity of depositing a coin therein, while it must be adapted to prevent outgoing calls without the deposit of the coin.

Automatic station selective systems adapted to accomplish the results set forth in the preceding paragraph, have been devised; for example, systems such as are shown and described in our 00- pending applications Serial Numbers 512,620 and 554,190.

However, in the present system, it is frequently possible for the calling party tostrike a sharp blow on the housing of the telephone station and thereby release the coin to permit it to be refunded, even though the called station has been efiectively connected.

It is an object of our invention to provide a pay telephone station in which the outgoing calls may be accomplished only upon the deposit of a coin, but which will permit incoming calls to be effectively connected without the necessity of depositing a coin, and which cannot be actuated by a blow on the housing to refund a coin if the connections are efiectively made to talk to a called station.

Another object of our invention is to provide a pay telephone station which is provided with looking means,preventing conversing and/ or dialing, in the case of outgoin cal but whi h will portion 53% the coin collecting and refundingde- "permit conversing inthe event of an incoming of greater denomination.

Another object of the invention is to'provide a pay telephone station in which communication with a long distance exchange, information, or

other telephone system service or business office, may be accomplished by the deposit of any one of a numbcr of different denomination coins;

thus making it unnecessary for the calling party to have the exact minimum charge denomination coin in order to put through calls of this character.

Another object of the invention is to provide means for holding such initially deposited coins in abeyance in the station, ready to be refunded upon the completion of such no'nchargeable calls.

Another object of our invention is to provide 1 a pay telephone station in which spurious coins,

either undersized or underweight coins, will be segregated from correct weight or size coins, and which will prevent effective operation of the station by such spurious coins.

Other objects of our invention will be apparent from a study of the following specifications, read in connection with the accompanying drawings, wherein Fig. 1 is a front elevational view of a pay tele- 'phone station constructed in accordance with our invention; a

Fig. 2 isa front elevational View of a telephone station illustrated in Fig. 1, showing the cover open and exposing the coin collecting and refunding apparatus;

Fig. 3 is a vertical sectional view taken along the line III-III of Fig. 1 illustrating the coin collecting and refunding apparatus associated with the talking and listening and dialing apparatus;

Fig. 4 is a detail rear elevational view of the coin collecting and refunding apparatus shown in Fig. 2;

Fig. 5 is a detail side elevational view of a. portion of the coin collecting apparatus illustrating the operation of portions of the device by the receiver hook; i l

Fig. 6 is a fragmentary elevational view of a Fig. '7 is a detail horizontal sectional view taken 7 along line VIIVII, Fig. 2, showing the magnet tion. V 7 V Referring to the drawings, we have illustrated in'Fig. 1, a pay telephone station comprising ay 7 .mumfienomination coin, such as a nickel, while 7 and coin collection device in assembled relation;

Fig. 8 is a detail sectional view taken along line VIIIVIII of Fig. 6, illustrating the basket tripping device;

Fig. 9 is a fragmentary sectional view taken along line IX-IX of Fig. 7;

Fig; 10 is a fragmentary sectional along line XX of Fig. 3; and

'Fig. 11 is a diagrammaticview showing the wiring employed in connecting our pay telephone station to the supply box-like housing I having side walls 2 and 3, a top wall 4, a bottom wall 5, and having a cover 6 hi-ngedly secured to. the side wall 3, asby means of a hinge "I. A look -8 is preferably provided for maintaining the cover in closed position when the pay telephone statioriis installed. v The telephone station includes a transmitter 9, a receiver 'll/and a dial selecting device H; all of which apparatus is preferably mounted uponthe cover 6 of th'ehousing I so as to permit all'of this apparatus to swing out of the way when the door or cover 6 is opened. A coin return slot or open- 'ing l2 is provided through thefront cover 6 for the purpose of permitting a person using the V telephone to remove coins which are refunded by reason of failure to obtain the service for which coins may be deposited.

It will be observedthat the receiver'lfl is normally supported upon a receiver hook l3 which, like the transmitter dialselector, etc., is mounted for pivotal movement upon the front covert of the housing I. l r

By'referring particularly to Figs. 2 and 3, it will be observed that a coin collecting and reof the housing I, such mechanism including a "coin guide [4 terminating at its upper end in a coin gauge l5 constituting a plurality of circular entrance openingsl8, l1 and I8, each of which 'isdesigned to accurately fit the particular denomination coin to be inserted therein.

For example, the circular opening l6 is pref- 'erablyoi such diameter as will just admit a mini- .the 'opeiiingfl'l fits a larger denomination coin, such as a'dime, and the opening I8 fits a still larger denomination coin, such as a quarter. l'he coinguide is provided with a slot leading from each of the circular openings 16,41 and I8,

*thes'eslots being designated by the reference icharactrs 19 (associated with the nickel gauge -l6)1,'"slot 20,"(associ'ated with the dime gauge l1) and a slot 2| (associated with theguartergauge 18). The coin guide [4 terminates at a point .-'22 immediately above -'a transfer basket 23 m'ounted upon transverse ;trunnions 24 and 25 soas'to have-aslight forward and rearward motion above its pivot. The basket 23 is illustrated V as being provided with a .plurality of slots 26,

21;eind-28,theupper-ends of ,which are aligned, respectively, with the lower end of the nickel pass downwardly through the coin guide and into the respective'slots' of :thebasket 23. 7

Immediately below the transfer basket :23, we

view taken lines from a centralsta funding'me'chanism is provided upon the interior have illustrated an initial-call coin slot 29 which,

as is more clearly illustrated in Fig. 4, extends entirely across the rear of the coin guide 14 and has a single slot 30 therein coextensive with all of the slots 26, 21 and 28 and therefore is adapted to receive coins from any one of these slots in the basket 23. V I r vThe initial call coin slot 29 is illustrated as which slot is in turn aligned with. a similar'slot 20 and 2| and is adapted to receive any light weight coin which may be deposited in these slots as by cutting away a portion of the coin guide I 4 immediatelyto the rear of these slots, as is indicated in Fig.4 at 40 and securlnga rela- ,tively thin spring structure 4| to the forward side of the slots (l9, 20:0r 2|), capable of exerting sufiicient force to overcome the weight of 36 constituting an entrance passage into a' coin a coin of any lesser weight than the proper coin for which the slot is adapted. For example, the spring structure 4|, associated with the quarter-slot 2|, should be designed toibe readily flexed by a coin having-the weight of. asub'stan tially thin quarter, but should not be flexed by any coin or; other article which is deposited in slot 38.

iii

By referring particularly toiig. 4, itwill be;

observed that the slot 39 extends downwardly and laterally of the housing I'to terminate in an r opening 42 immediately above a refund chute.

43 which. constitutes a 'slideway extending forwardly of the housing I into a position imme- V diately above a refund box 44 secured to and forming a part of thefront cover 6 of the telephone station. Thus light weight coins will be segregated from the coin collection devices and be immediately returned to the user without entering the coin collection mechanism and thereby preventing the -eifective operation of the telephonestation by such light weight coins.

Since our telephone station isdesigned to be employed foreither local calls or long distance calls, it is essentiakthat the coin" collection mechanism shall be adapted to receive deposits.

of toll for long distance coins, and for this reason we have illustrated the 'usualcoin ma ze '45}. V

ordinarily employed in pay telephone stations, such .coin. maze being well knownin the artas comprising a'nickel-coin chute 46,,a: dime coin chute 41, and a quarter coin chute 48 each of which chutes extends, respectively, from immediately below the nickel slot IS, the dime chute 41 is disposed immediately below the dime chute 20 and the quarter chute 48 is disposed immediately below the quarter slot 2|.

--.-However, by referring to Fig. 3,v it willbeobdiately below the slot: in the coin guide-asso- V ciated with the respective denomination? coin. That is, the nickel chute 46 is disposed 'lmmeserved that the upper ends of each of the chutes 46, ll and 48 is disposed slightly to the front of the transfer basket 23 so that coins which are deposited in the chutes I9, 20 and 2| cannot enter the coin maze 45 unless the transfer basket 23 is in its forward position instead of the rearward position, as is illustrated in Fig. 3.

By referring particularly to Figs. 2 and 8, it will be observed that the right hand end of the transfer basket 23 is provided with a transverse depression 49 therein for the purpose of engaging a pin 59 which is slideably mounted in the vertical strut forming one side of a suitable supporting frame 52, by which all of the coin collection and refunding devices are mounted within the housing By referring particularly to Fig. 8, it will be observed that the normal position of the pin 50 is such as to engage the forward side of the depression 49 and thus hold the basket 23 in the rearward position, such as is illustrated in Fig. 3, but may be withdrawn to permit the basket 23 to descend by gravity to its forward position with its slots aligned with the long distance coin collection maze 45. Thus it will be observed that the normal position of the transfer basket 23 is such as to direct all proper denomination coins deposited in any of the slots I9, 20 and 2| into the initial coin call chute, while the transfer basket may be actuated as hereinafter described to its forward position to permit any coins which are deposited in the slots I9, 20 and 2| to pass into such long distance collection maze.

Referring again to Fig. 3, it will be observed that a still further coin chute 53 is provided mounted in front of the coin guide M. This coin chute is adapted to refund undersized coins or spurious coins which may be deposited in the slots I9, 20 and 2|.

By referring to Fig. 4, it will be observed that the front wall of each of the chutes l9, 2!! and 2| is provided with an arcuate opening 54 which extends through a considerable portion of the width of the slot with which it is associated. However, the lower portion of the opening 54 extends but slightly beyond the center line of the slot and a projection 55 is left extending transversely of the slot so as to engage beyond the center of anyproper denomination coin and guide the same past the opening 54. However, an under-sized coin, that is, one of smaller denomination than the correct coin for the slot, will, by reason of the twist 55 placed in the slot l9, be directed to the opposite side of the slot from which the projection 55 extends, and thus the projection 55 will not engage such coin beyond its center point and the coin will fall out of the slot l9. In like manner, slugs or tokens having a central opening therethrough will not be supported by the projection 55 but will fall outwardly from the opening 54 and thus pass into the spurious coin chute 53.

The coin chute 53 terminates at 5'5 immediately above the refund box or receptacle 44, so that spurious coins which are undersized will be returned immediately to the user Without entering the coin collection devices and thus prevent effective operation of the telephone station by such spurious coins.

Referring again to Figs. 2, 3 and 4, it will be observed that the initial-call coin slot has an opening 58 extending through both the front and rear walls of the slot into which projects one end of a rod or wire 59 constituting one arm of a lever 6|! pivoted to the strut 5| of the frame 52, as is indicated at 6|. The lever 60 extends beyond the pivot and is bifurcated at 62 to engage a head 63 formed upon the pin 59, so that a coin passing through the call-coin slot 32 will engage the rod or wire 59 and move the pin 56 outwardly with respect to the basket 23, .thus releasing the basket to permit it to move to its forward position. This operation insures that'the initial-call coin which is deposited will pass into the initial-call coin chute or slot, while further coins which may be deposited will be directed into the long distance collection maze 45. The pin 5!] may be biased inwardly by a spring 5% adjustable by means of a set screw 59 secured to a bracket 50 mounted upon the frame 52.

It will be observed that a switch 64 is mounted upon the rear of the coin guide I4 in such position that the switch arms or contacts 65 and 65 of this switch are normally held in contacting position by the engagement of the rear surface of the basket 23 with the switch 64 when. the basket is in its rearward position. This position of the basket will also hold contacts 55 and 65 in contacting position while contacts 55 and 55 will be he d in open circuit position ready to close when the basket 23 moves forward. The function of the contacts will be further detailed hereinafter. l

As will be hereinafter described, the switch 64 is connected in the circuit of the talking or dialing mechanism so as to prevent effective calling from the pay station until a coin has been deposited to secure the opening of the switch'fi. After a coin has passed the rod or wire 59' it continues to descend through the initial-coin collection chute 35 to come to rest upon a coin holder 67 which comprises a substantially shelflike plate of metal extending transversely through a slot 68 penetrating both the frontand rear walls of the chute or slot 36. Thus the initially deposited coin prepares the station for calling another station, the long distance operator, or any other local call condition.

By referring particularly to Fig. 3, it wi l be observed that the initial-call coin chute 38 is provided with an opening 69 in its side wall to permit egress of coins from above the shelf-like coin holder 6? and permit them to pass to the refund chute 43 and thence to the refund receptacle 44. The slot or opening 69 is normally bifurcated by means of a pin constituting the end of a rod or bar H which is rotataby mounted at its upper end 12 to a bar 73 pivotally mounted in a suitable bearing, such as a tube l t, for rotation about a horizontal axis at the rear of the collection mechanism. The rod H is connected for movement with the bar li'by means of a dog H bar 73 is illustrated as being bent downwardly into a position to engage the inner end of a rod 16, (see Fig. 5), which is mounted for horizontal reciprocation in a bearing 11 attached to the strut l8 forming the left-hand side of the frame 52.

It will be observed that the forward end of the rod 16 terminates in a button 19 adapted to be engaged by a lever 83 pivotally secured to the front cover 6 of the station and arranged to be actuated by the inner end 8| of the receiver hook l3. Thus, whenever the receiver if! is on its book IS, the lever 89 will be pressed inwardly to press the rod 16 rearwardly and cause the bar 13 to be moved to its rearward position, thus removing the pin 10 from its obstructing position in front of the. refund opening 69 of the The opposite end l5 of the.

initial call coin chute. 'Howe'ver, whenever the receiver is lifted fromits hook l3, as is the ordi- 'nary procedure when a'person is attempting to hook upon failure'to'complete the call.

make a call from the station, the lever 80 will be permitted to move forwardly which will result in the movement of the bar I3 to its forward position and cause the exertion of the pin 73 into obstructing position in front of the refund opening. Thus the initially deposited coin will be held in abeyance by the combinedgefforts of the coin holder and the pin I until thecall is completed, or the receiver is returned to the It will be apparentthat upon the return of the receiver tothe hook, the coin which has been held in the chute 30, will not be permitted to pass through V the refund opening 69 and thence to the refund receptacle 44, thus insuring the return of a deposited-coin wheneverthe call cannot. be com pleted for any reason, such as failure of the calling'station to respond or the calling station be- J ing' busy.

It will be observed that the initial coin which is required to obtain the initial call connections, need not necessarily be the minimum local call denomination call coin or nickel, but the station 7 comprises mounting the shelf-like coin holder 61 upon a lever 82, the'lower end of which is pro- V structing position in the chute 30.

Preferably the coin holder '61 is pivotally se- 'cured to the lever82 as by means of providing a may be effectively operated to obtain a local con nection bymeans of the deposit of any one of the three denomination 'coins for which the station is adapted.v This is. particularly desirable inconnection with calling long distance operators, since it is not necessary that the'exact minimum charge shall be'deposited, but any of the three, f coins, nickel, dime or quarter, maybe employed to obtain the initial connection with the long distance operator. a r

In order to obtain the proper collection of the coin, in the event that the call is completed,

mechanism is provided for withdrawing the shelflike coin holder 61 to permit the coin to pass downwardly beyond the coin holder and thus pass through the terminal'33 of the chute 30a'nd into the collection receptacle 31. This mechanism vided with a bearing 83 'pivotally secured to a bracket 84 as by means of inserting one end'85 of a suitable opening (not shown) in one leg of the bracket and passing a trunnion pin 86' through the other leg of the bracket and intoa suitable opening (not shown) in the bearing 83.

Thus the lever 82 may be rotated about its pivot to draw the shelf-like coin holder 61 out of obpair of outwardly extending ears 8'! upon the coin holder 61 and securing the coin holder to the lever by means of' a transverse pin 88 passing through the ears and the lever. If desired, an adjusting screw 89 may be provided upon the upper end of the lever 82 to limit the rearward movement of the lever and thus limit the inward 'movement of the coin holder 61.

92 will draw the armature 9I toward: the coil while at the same time the lever 90 will be moved outwardly. The end of the rod 90 is illustrated as being connected by means of a link 94' to a forwardly extending ear 95 formed upon the'lever 82 so that outward movement of the rod' 90 will cause a forward movement of the lever 82' Ifdesired, a spring 96 may be provided around the and thus withdraw the coin holder 61.

bearing 83 to normally bias the lever 8 I to its rearward or inner position to thus. insure that the coin holder 61 will normally be in. position to en V gage coins passing through theslot 30. a

' As hereinafter described, the relay 92 is arranged to be operated as the result of the transmission of reverse current over the line to which our pay telephone may be connected when the called station responds to thecall. Thus when-,1 ever acallis completed, the relay 92 is operated to withdraw the coin holder 61 and insure collec=- tion of the coin. Moreover, the time at which it will becollected is at the instant the called station responds; so that there willbe' no opportunity for a person to. converse over our pay station and then recollect the coin at'the end of V the call.

The remainder of the apparatus disclosed will best be understood with reference to a series of assumed operations of our pay telephone station:

Assuming that a person desires to make a local telephone call fromour station, such person may lift the telephone receiver I0efrom its hook I3.

Howevenat' this time the talkingror dialing apparatus of the telephone is preferably'out of op-i erative condition to prevent effective calling or talking over the telephone until :a coin has been deposited. This may be accomplished by inter connecting circuits of the telephone pay station,

as is indicated in Fig. 11, wherein a pair of line iconductors'Line-d and Line2 are represented as being thetwo line conductors extending from the central station to which the telephone may be connected.

A ground connection is also provided for the pay telephone station," as by way of conductor I00, to aground indicated at IN. A hook switch I02 is illustrated as being of the usual type employed in connection withtelephone stations to be actuated from a normal position, suchas that illustrated in Fig. 11, when the receiver is on the hook, to its opposite position when the receiver is removed therefrom. A dial switch I03 is illustrated as being, operated by the dial selecting mechanism II. I

A reverse current relay I04 is provided as comprising the usual type of reverse current relay which will be operated only by current flowing in one direction, thus permittting effective operation 1 of this relay only when'an incoming call connection is made, or when a called station responds to the call. 7 Under the assumed combination, the receiver had been lifted from the hook and thus moved the switch I02 from the position illustrated in Fig; 11, thus establishing a circuit extending'from Line- 4 through conductor I05, the contacts I06 of the reverse current relay I04, cone ductor I01, the coil of. reverse current relay I04 to theconductor I08, the contacts I09 of the dial a switch I03, (which at this time will be closed since the'dial has notas yet been operated), thence through the conductor I I0, transmitter 9,

conductor. III, the primary coil P of a transformer II2, conductor II3, the contacts III of the hook switch I02 (now closed), and then by way of conductor 5 to Line-2'.

By reason of this connection, the normal dial tone will be emanated from the receiver I0, indicating that the telephone is in condition for operation. However, it will be observed that a shunt circuit is provided which shunts out the transmitter T and the dial switches I03, preventing effective operation of the dial and preventing effective talking over the line until the shunt cirsuit is opened. This shunt circuit is illustrated as extending from Line1 by way of conductor I05 to a junction point H6 and thence by way of conductor I I I to the normally closed contacts I I8 of a switch H9 controlled by the relay 92 employed for collection of coins in the initial call coin chute. Thence the shunt circuit extends by way of conductor I20 to the normally closed contacts 65 and 65 of the basket switch 64, which is arranged to be normally held in closed position whenever the basket 23 is in .its rearward position ready to direct coins into the initial call coin collection chute 30. Thence the circuit extends by way of conductor I2I to a junction point I22 on conductor II I. Thus current is effectively prevented from passing through the reverse current relay I04, the dial switch I03 and the transmitter 9 until a coin is deposited.

Assuming that the person desiring to make the local call now deposits a coin in one of the coin gauges I6, I! or I8, such coin will pass down through the coin slot I9, 20 or 2|, respectively, and thence into the initial-coin collection chute 29, passing downwardly therein until such coin engages the rod or wire 59 and moves the same laterally in the slot 32 to withdraw the pin 50 and permit the basket 23 to move to its forward position. Movement of the basket 23 opens the contacts 65 and 65 of switch 64, thus removing the shunt which has been holding the dial and transmitter circuits out of effective operation. Hence as soon as a coin is deposited the telephone station may effectively be operated to select the particular called station to which the party desires to talk.

However, during the operation of the dialing mechanism the coin which has been deposited will be held in abeyance upon the coin holder 61 and since the receiver is off its hook, the pin 10 will be in position across the refund opening of the initial-call coin chute 30 and thus the coin will not be permitted to pass either to the collection receptacle 3? or to the refund receptacle 44.

Assuming that the called station fails to respond for any reason, the person using the telephone may hang up the receiver. In doing so the receiver hook I3 will be operated to move the bar I3 to its rearward position, thus removing the pin I from the refund opening of the initial-call coin chute and permitting the coin, which has been held in abeyance, to pass out to the refund receptacle 44 where it may be retrieved by the party making the initial call.

By referring particularly to Fig. 5, it will be observed that the rod I6, which is operated by the receiver hook to move the bar or rod I3 to its rearward position, also carries an upwardly and rearwardly extending pin I23 which engages in a slot I24 in the forward side of the basket 23 so that whenever the receiver is returned to the hook I3, the basket will be mechanically moved to its normal rearward position, such as is illustrated in Figures and 3, reclosing the contacts 65 and 65 of the basket switch 65*, thus conditioning the telephone for a subsequent operation by any other person who desires to make a call. Thus, it will be observed that the only way in which a coin can be refunded to the calling party is by operating the receiver hook I3 and the consequence of this operation is to restore the telephone circuits to normal condition, requiring a new deposit of a coin in order to permit further calls to be made.

However, assuming that the called station does respond, such response will be accompanied by the transmission of reverse current over the line Line1, Line2. That is, the current which passes over the line will be in the reverse direction from that which has been previously flowing in the line, as is the usual practice in pay telephone station practice at the present time. Such reverse current will cause actuation of the reverse current relay I04 since the circuit for this relay is now effectively a part of the circuit between Line 1 and Line2.

Tracing this circuit, the reverse current will flow through line conductor Line-2 by way of conductor II5, the now closed contacts II4 of the hook switch I02, conductor II3, the primary P of transformer II2, conductor III of transmitter 9, dial switch contacts I09 (now closed since dialing has been completed), conductor I08, relay I04, conductor IIlI, contacts of reverse current relay I06, and conductor I05 to line conductor Line-1. It will be remembered that at this time the basket switch 64 will be in open circuit condition, and thus the shunt across the circuit just described will be open.

Referring particularly to Fig. 11, it will be observed that the coil 92 is normally connected in shunt circuit relation with the contacts I06 of reverse current relay I04; that is, the circuit for the relay 92 extends from conductor I05 by Way of conductor I25 to coil 92, conductor I26, contacts I2? of hook switch I02, (now closed since the receiver is off the hook), conductor I28 to junction point I29 on conductor I01, and thence by way of conductor I0'I, contacts I06 of reverse current relay I04 and conductor I05 to line conductor Line1. Thus until contacts I06 of the reverse current relay I04 are opened, no current can flow through the coil 92. However, as soon as reverse current flows over the line and reverse current relay I04 is thus operated to open its contacts I06, current will be supplied to the coil of relay 92 to cause this relay to actuate its armature 9|.

The effect of the operation of the armature BI is to move the rod 90 forwardly to thus draw the lever 82 forwardly, removing the coin holder 67 from its obstructing position in the initialcall collection chute 32 and thus permit the coin which has been held upon the shelf or holder to pass downwardly through the openings 34 and 36 into the coin collection receptacle 31.

Thus it will be observed that as soon as the called station responds, the coin required for such call is collected immediately.

It will also be observed that the actuation of the lever 82 to withdraw the coin holder 61 will, by reason of the pivotal connection of the coin holder with the lever, draw the coin holder directly through a straight path, thus the only resistance to the Withdrawal of the coin holder is that friction which is created by the weight of the coin bearing the coin holder 61 against the bottom of the slot in which it operates. Moreover, by reason of the pivotal connection of the coin holder 61 any rebound or jarring which may occur as a result of the coin dropping upon the holder, will be absorbed by the coin holder and will not be directly transmitted to the lever 82,

thus effectively preventing a falsereturn of the lever 82 to collectthe coin until the lever 02 is' actuated by the operation of relay 92.

Again referring to Fig. 11, it will be observed fthat as soon as the coil 92 operates to move its 7 armature 9| an extension I30 on the armature will engage the switch H9 mounted upon the 'frame52 (see Fig. 2), to causethe opening of contacts H8 and the closing of contacts ,I3I of thisswitch. The closing of contacts I3I will complete a shunt circuit around the 0011.92 to remove the resistance of this coil from the talking and listening circuits, thereby increasing the amount of current which is permitted to flow in the talking and listening circuits. This shunt circuit is illustrated ascextending from line conductor Line1 by way of conductor I05 to junc- 7 tion point H6 and thence by way of conductor H1, contacts I3I of switch II 9, conductor I32, junction point I32 which constitutes the other terminal of coil 92 and thus provides a metallic path of low resistance'around the coil 92. However, it will be noted that a circuit has now been established for the reverse current relay I04 which is independent of contact I06 of this relay, this circuit extendingfrom Line1 through conductor H1 and through the contacts I3I of switch H9, the contacts 65 and 65 of the basket switch 'to junction point I32 and thence by way of conductor I26, contacts I21 of hook switch I02, and conductor I28 to the coil'of relay I04, conductor I08 and thence through the dial and transmitter and primary transformer H2 and contacts H4 of hook switch I02 and'conductor H5 to line conductor Line-2. However, as soon as the call is completed and the calling party restores'the receiver I0 to its hook I3, the operation of the hook switch I02 will open the talking and listening circuits, While at the same time the basket 23 will be moved back to its normal rearward position reclosing the basket switch 64 and thus restoring the ,circuits' to normal and ready for another call. 7,

Next assuming that the party desiring to use the telephone wishes to make a long distance call, the receiver I0 will be lifted from the hook I3, as hereinbefore described, but again it will since the basket 23 is released from its rearward positionit is now in its forward position aligned with the long distance collection maze 45.

The long distance operator, upon responding, will receive the number of the called station and V has a choice of either of twooperationsfriamely,

first, she may request the calling party to hang up thereceiver and wait until she rings, or, second, she may request him to hold the line until the connection with the called station has been obtained. Assuming that she requires the callingparty to restorethe receiver to the hook, the

pin I0 will be withdrawn, as hereinbefore described, and the initial-call coin will be refunded in exactly'the same manner as hereinbefore set forth.' e

Assuming that the longdistance operator obtains the connection with the called station, she may thenring our pay telephone, station by send ing ringing current over Line-1 and"ground,'as

is the usualpractice in central station telephone operation. The ringing circuitextends from line conductor Line1, through conductor I05, re-

' verse current relay switch I06, conductor I01 to junction I29, and thence by way of conductor: I20 7 to junction I33, thence by way of conductor I34 to the bell coils indicated; by the legend Bell, conductor I35; to junction I36, thencecbyway'of conductor'I3I, normally closed contacts I38fof hook switch I02, (now closed since the receiver is on the hook), and thence by way of conductor I39, ringing condenser I40 and conductor I00 to ground at I"0I.

Since thelong distance operator is calling our pay telephone station, it is necessary that the telephone station should be placed in condition for talking without the necessity of a re-deposit of a coin in the initial-call coin collection chute, and for this reason we have provided an auxiliary circuit parallel with the bell circuit to cause the operation of the relay 92, This parallel circuit extends from line conductor Line--1 through conductor I05,.conductor I25, coil 92, conductor I26 to junction I36 andthence to ground by 'wayof conductor I3|, as was previously described for the bell circuit. Hence coil 92 will receive a pore will bev observed that the extension I 30 on the armature 9| extends beyond the. switch H9 to a position immediately below a lever I4 I. The lower face of the lever MI is provided with a stepped .recess comprising a normal lower level I42, an

intermediate level I43; and an uppermost level I44. The lever MI is i lustrated as being pivoted at I45 to the strut I8 of theframe 52 so as to permit the lever to have a vertical movement. The lever MI is also illustrated as having a cam I46 pivoted thereto at I41 toengage a rod or wire I48 rigidly secured to a shaft I49 which is in turn pivoted in a. bracket I50 secured to a strut '19. A second rod I5I, also rigidly connected to the shaft I49, extends upwardly to a position immediately in therear of the downturned end 15 of the rod or bar I3. Hence whenever the telephone receiver is on its hook the lever.00 will press the rod or bar 13 to its rearward position and by reason of the engagement of the rod I5I there-, with, the rod I49 will be pressed outwardly to a position limiting the inward movement of the extension I30 on the armature 9|. 7

It will be observed, however, that the limit of movement of the extension I30 is such as to permit the extension to move inwardly past the lower level I 42 to the intermediate level I43 of the lever I4I. Thus energization of the relay 92 will cause the extension I30 to be moved inwardly to a first position, whereit engages in the notch formed between the levels I42 and I43 on the lever I4I. From an inspection of Fig. 5, it will beobservedthat this amount of movement which is permitted theextension I30, will be sufficient to move'the contactsof the switch H9 to such po sition as will open the contacts I I0, but will not be sufiicient to close the contacts I3 I.

It will be remembered that-in the tracingof the normal circuits' of the telephone station,'

the circuit which prevented effective. operation of the talking or dialing mechanisms that the disabling of the talking and selecting circuits is removed from either of the following two operations; first, the deposit of a coin which moves the basket 23 and opens the basket switch 64; or, second, the operation of the relay 92 which opens the contacts H8 of switch H9. Hence the initial ringing of the telephone prepares the talk ing circuits so that the telephone is conditioned for talking by the actuation of the ringing device of our telephone station.

When the person desiring the long distance call responds to the ring by lifting the receiver from its hook, the rod I 58 will be permitted to swing rearwardly to no longer obstruct the movement of the extension I30, and since the long distance operator is calling our station, she may place reverse current upon the line to operate the reverse current relay 04 to cause further energization of the coil 92 in the manner described with reference to the response of any called station.

Thus the relay 92 will be actuated to operate its armature SI and the extension I thereof will further operate the switch H9 to close contacts I 3I, thereby effectively removing the resistance of the coil 92 over the talking circuit and permitting conversation over the telephone unobstructed by such additional resistance upon the line.

Since the connection is ready for the long distance call, it is now necessary that the long distance operator should inform the calling party as to the amount of toll which must be deposited and the coin collection apparatus must be arranged so as to permit the deposited coins to pass directly into the long distance coin maze 45. This is accomplished by means of an interconnection between the actuation of the relay 92 and the operation of the basket releasing pin 50.

By referring particularly to Figs. 2 and 3, it will be observed that any actuation of the relay 52 will be accompanied by an outward movement of the rod 95 attached to the armature 9| of the relay. This operation will cause outward movement of the lever 82 to withdraw the coin holder 61, as was previously described herein with reference to a local call. However, it will be observed that the lever 82 is provided upon its lower end with an extension arm I53 which will be moved downwardly as the lever 82 is moved outwardly under the influence of the rod 98. The extension I53 is connected by means of a rod or wire I54 to an outstanding lever I55 connected to the lever 60. This connection is effected by means of forming a relatively elon gated slot I56 in the extension I53 to engage the hooked end of the wire I54, while a similar elongated slot I5! is provided in the lever arm I55 to engage a hooked end formed upon the opposite end of the wire I54. Thus whenever the relay 92 is actuated, as in the case of the long distance operator calling our pay station, the responsive movement of the rod 90 will cause a downward movement of the arm I55 on the lever 80 and thus will cause the lever 6!] to be operated in the same manner as though a coin had been deposited in the initial-call coin slot and operated the rod or wire 59.

However, it will be observed that by reason of the elongated slot and hook connection between the wire I54 and the extension I53 and arm I55, the operation of the lever 60 will not cause movement of the lever 82, and thus though the lever 68 may be moved under the influence of the lever 60 on the initial coin chute, it will not cause the lever 82 to remove the coin holder.

Thus there is' provided two distinct methods of moving the transfer basket 23, namelyby the deposit of the coin, and by the actuation of relay 92 by an incoming call. Likewise, there are two distinct functions of the relay 92, namely, that of causing collection of coins for an outgoing call, and that of operating the transfer basket in response to an incoming call.

The operation of the lever will withdraw the pin 58 from its holding positon with reference to the basket 23, and the basket will therefore be moved to its forward position ready to direct coins into the coin maze 45. Hence the calling party may now deposit the required nickels, dimes or quarters necessary to make up the total toll charge for the particular call which he is making.

It will be understood by those skilled in the art that the deposit of the coins in the nickel slot will cause them to pass through the nickel slot 45 and thence to be directed against a suitable audible signal I53, and coins deposited in the dime slot will pass through the dime slot 4! to be directed against the audible signal I58 twice during its passage through the maze; quarters deposited will pass down through the quarter slot 48 to be directed against a different tone audible signal I59. All of the coins, after they have actuated the audible signals, will be directed to the lower end I65 of the coin maze and thence pass through an opening IfiI in the partition 35 and through a suitable opening I62 in the coin collection receptacle As was described and claimed in our copending application, Serial No. 554,190, filed July 31, 1931, the coin receptacle 3? may be divided into two compartments by means of a partition I53 so as to segregate the local collections which pass through the openings 34 and 36 from the toll or long distance collections which pass through the openings IfiI and IE2.

On the other hand, assuming that the long distance operator, upon receiving the number of the station desired by the calling party, requests the calling party to hold the line, the obtaining of the long distance call will be made in the usual manner and prior to connection with the called station, the long distance operator may request the deposit of the necessary toll charges. Under these conditions. it will be observed that the basket 23 will have been moved to its forward position in response to the deposit of the initialcall coin so that the basket is in the correct position to direct the toll charges into the toll long distance collection maze 45. However, the initial coin which was deposited to obtain connec tion with the long distance operator will be held in abeyance in the initial coin collection chute until the end of the call. At this time the call ing party will hang up the receiver, thereby removing the pin I5 from the refund opening in the coin chute, and permit the initially deposited coin to be refunded to the person using the telephone.

It will be observed that when such connection is made, the long distance operator does not send reverse current over the line to our telephone pay station, and hence the relay 92 is not operated, and therefore there will be no removal of the coin holder 61 during the entire time the long distance call is taking place.

Assuming now that some other station desires to call our pay telephone station, this is accomplished in the usual manner by the actuation of the central station selectors to make while connection with our pay telephone station. As. was described with reference to the calling back.

movethe extension 130 to the fir st notch of'lever M l, thus preparing the telephone for the response to the call. When the receiver I0 is lifted from the hook IS, in response to such ring, the current from the calling station will be reversed current operating reverse current relay I114 and further operating relay 92 to remove the resistance of relay 92 from the talking circuit and permit unobstructed response to the calling station without necessitating the deposit of a coin in our station.

The purpose of providing the double notch in lever IAI to cause the operation of the switch H9 to follow two distinct and consecutive steps, is to insure that an incoming call will be effective to connect our telephone station for talking to the calling party, while the mere response of a station which is called from our pay station will not be effective to condition the circuit for talking.

Thus while our station is effectively operated for talking for an incoming call, it will be impossible for a calling party at our station to obtain connection with the called station and yet obtain a refund of the coin which he deposited for such call. This purpose is more readily ap-,

parent from a study of thetwo conditions.

Upon attempting to make an outgoing call, the party at our station will lift the receiver from the hook and deposit his coin, thus opening the shunt around the talking and dialing circuits, permitting him to operate the selectors necessary to ring the called station. 'By merely holding the receiver off the hook, the circuits which have beenestablished by the deposit of the coin will remain eifective when the reverse current comes over the line in response to the answering by the called station, and in addition, the reverse current will cause the collection of the coin. However, should the calling party at our station attempt to obtain a refund of his coin after the ringing connection is made with the called station and before the answering by that station, our station will become immediately disabled for talking even though the called stationanswers. In other words, the only way in which the reverse current coming in from another station can effectively operate our telephone is when the call is accompanied by two distinct operations, namely, first theringing of our station, and, second, the supplying of reverse current to our station from the outside calling station.

This operation will be best understood from an inspection of Fig. 11, in which it will be observed that'the circuit to thereverse current relay I04 is normally shunted by the circuit which includes the contacts .I I8 of switch H9, and the contacts 65 and 65 of the basket switch 64. In other words, this shunt circuit excludes not only the transmitter and the dial circuits from effective connection with the line Line-4, Line2, but also efiectively prevents theoperation of the reverse-current relay, as well.

Thus while an incoming call, which includes the double operationof the ri'nging of our telephone station andtheresponding byour telephone station, will succeedinremovingthe shunt circuit from car telephone station, by the initial opera: tion of relay'92 by the ringing current, while the receiver isstill upon the hook, thuscausing the V of switch ltlflfanattempt on the part of a person using our telephone to obtain are- 1 fund of his coin and still'talk with the station:

he has'fcalled, will: be effective.

Assuming that a p ,ty .at our-te1ephone sta tion deposited his coin and is dialing the numbef'of the station to which he desires to be connected, and that connectionis successfully established with the calledstation, the deposit of the coin has opened the shunt circuit at, the

basket switch 6Q.

Now assuming that while the called station is ringing, the party at our station hangs up the receiver or momentarily operates the receiver hook to cause the removal of the pin 10, to refund the deposited coin, such false operation is accompanied by two distinct effects, namely, the basket 23 is pressed back to its original position by means of the rods 1,6 and I23, while at the; same time the accompanying forward movement of the rod or wirelfl will cause the end of that wire to ride under the cam 6 and lift the lever I, while at the same'time the outward movement of the rod I48 will engage the extension I30 on the armature 9| of relay 92 and will press against the extension I30 on the armature 9,] of the relay 92 and will insure that this armature is in its normal nonoperated condition. This will insure that the switch con tacts H8 of switch H9 are closed so that the rearward movement ofthe basket 23 will close switch 54 and rte-establish the shunt circuit,

taking the, transmitter, the dial, and the reverse.

current relay out of effective circuit operation. Thus as the called station responds and sends reverse current over the line to our pay station, such reverse current is not permitted to enter the reverse current relay IM and therefore the relay 92 is not operated and the shunt across the talking circuit remains across this circuit and effectively prevents conversation.

In other words, the false operation of our telephone in attempting to obtain both the refund of the coin and connection with the called station, is rendered futile and the attempt is defeated,

As hereinbefore described,'another station call ing our station will render our station effective for talking without the necessity of depositing the coin in our station. However, the necessity for providing devices rendering our telephone effective for talking uponthe completion of connec-' ceiver at our station isperformed. Thisjit will, 7 be observed, followsfrom the catching of the ex-g V tions of the armature 9| in the first notch of lever Ml which will only be released upon the lifting of the receiver and restoration of the receiver to itslhook.

However, the possibility of this falseoperation or this possibility of obtaining free service is obviated in our system by providingfa secondary shunt circu t grena in traieei ii fie lis i ee paratus which can be controlled only by the basket switch. By referring particularly to Fig. 11, While the normal shunt circuit around the transmitter, dial and receiver circuits passes in series relation through the contacts H8 of switch H9 and through contacts 65 and 65 of the basket switch 54, a secondary shunt circuit also extends around the transmitter, dial and receiver circuits independent of the switch contacts I I8. This circuit may be traced from junction point I22 on the receiver transmitter circuit through conductor l2, contacts 65 and 65 of the basket switch 64, and through conductor nu to a junction ill on conductor I08 from the opposite side of the circuit to the transmitter and dial.

Therefore, unless the basket switch is operated, the talking and dial circuits of our telephone remain inoperative. It therefore follows that unless the receiver is lifted from our telephone in re sponse to an incoming call, thereverse current necessary to operate the reverse current relay and to cause the complete operation of relay 92 to trip the basket switch, will not occur, and the dial and transmitter circuits will remain shunted. However, as soon as the receiver is lifted from the hook the reverse current will operate the reverse current relay and will cause a tripping of the basket switch, as hereinbefore described, for the operation of an incoming call. Hence, though the incoming ringing current is permitted to operate the switch H8, this operation will not serve to render the station effective unless, and until, the receiveris lifted from the hook While the calling station remains connected with our pay telephone station.

While We have described the paths of the initial call coin which is deposited as passing immediately to the initial call coin collection chute to be refunded upon the restoration of the receiver, or to be collected upon the completion of the call, it frequently occurs that a person using the station deposits the ,coin prior to the lifting of the receiver from the hook. While, with the system hereinbefore described, such initial deposit of coin would immediately refund the coin, it frequentlyoccurs that a person does not observe, that the coin has been refunded and thereafter, upon lifting the receiver, and failing to obtain the desired connection, reports the telephone as out-oforder. This may be obviated by the employment of an auxiliary pin I12 forming the end of a rod I13 which is in turn connected to the link H which interconnects the receiver actuated rod l3 and thewire 1! so that whenever the receiver is on the hook the pin I12 extends into the initial call coin slot and holds the prematurelydeposited coin in abeyance until the receiver is lifted. Thereupon, the coin so held, may descend through the chute and operate the devices as was described herein for the normal calling operation,

To sum up, it will be apparent that we have provided a pay telephone station in which outgoing calls may be accomplished for either local service or for long distance service, and in which the deposit of any of the denomination coins for which the telephone is adapted may be deposited to obtain the initial connection or call. That, further, the telephone station is so arranged that an incoming call can effectively operate the circuits of our telephone to condition our telephone to receive incoming calls, while at the same time an outgoing call is rendered ineffective by an attempt to obtain the call without the consequent collection of the necessary charge for the call.

It will be further apparent that the arrangement of the coin collecting and refunding devices is such that the station cannot be rendered effectively operative by means of jarring, striking or otherwise tampering with the station and further that coins will be automatically collected or refunded depending upon whether or not successful completion of the callscan be obtained.

While we have shown and described the preferred embodiment of our invention, we do not desire to be limited to any of the details shown or described herein, except as defined in the appended claims.

We claim:

1. In a pay telephone station, means for rendering said station effective for making outgoing calls, including talking circuits, means normally rendering said talking circuits ineffective, means operable by the deposit of coins in said station for rendering said talking circuits operative, and means operably responsive to the combined operations of the ringing of said station and the response by said station for rendering said talking circuits effective to receive incoming calls.

2. In a pay telephone station including talking circuits and ringing circuits, a circuit normally shunting said talking circuit, and switching means operable in response to either the deposit of a coin in said station or the sequential operations of the ringing of said station and the response thereto by said station for opening said shunt circuit to render said talking circuit effective.

3. In a pay telephone station including talking circuits, a relay responsive to reverse current for controlling the collection of coins at said station, means normally rendering said talking circuits and said reverse current relay ineffective for operation, means operable by the deposit of a coin in said station for rendering said talking circuits and said reverse current relay effective for operation, means operable by the supplying of ringing current to said station for also ren-' dering said reverse current relay effective for operation independent of the deposit of a coin, and means operably responsive to the actuation of said reverse current relay for rendering said talking circuits efiective independent of the deposit of a coin.

4. In a pay telephone station, a main line circuit including two line conductors for connection to a central station line, a talking circuit connected to said main line circuit, a reverse current relay connected to said main line circuit to control the collection of coins deposited in said station, a ringing circuit including one of said line conductors and ground, a shunt circuit normally shunting said talking and reverse current relay circuits out of effective circuit condition, a receiver and a hook therefor, a relay connected to said ringing circuit for opening said shunt circuit when ringing current is supplied thereto, and means operable by depression of said receiver hook for actuating the contacts of said last-named relay to close said shunt circuit.

5. In a pay telephone station, a main line circuit including two line conductors for connection to a central station line, a talking circuit connected to said main line circuit, a reverse current relay connected to said main line circuit for controlling the collection of coins deposited in said station, a ringing circuit including one of said line conductors and ground, a shunt circuit normally shunting said talking and reverse current relay circuits out of efiective circuit condition, a receiver and a hook therefor, a relay connected to said ringing circuit for opening said shunt circuit, means operable by depression of said receiver hook for actuating the contacts of said last-named relay to close said position.

6. In a pay telephone station, a talking circuit, a reverse current relay, a circuit therefor, a shunt circuit normally rendering said talking circuit and said reverse current relay circuits ineffective, means operable by the deposit of a coin in said station for opening said shunt circuit to render said station effective to make outgoing calls, means for supplying reverse current to said station whenever another station is connected therewith, said reverse current relay being operable by said reverse current to actuate a coin collection device for collecting said deposited coin, and a relay operably responsive to the supply of current to said ringing circuit for opening said shunt circuit independent of a deposited com.

a reverse current relay, a circuit therefor, a shunt circuit normally rendering said talking circuit 7 and said reverse current relay circuits ineffective,

means operable by the deposit of a coin in said station for opening said shunt circuit torender said station effective to make outgoing calls, means for supplying reverse current to said station whenever another station is connected therewith, said reverse current relay being operable by said reverse current to actuate a coin collection device for collecting said deposited coin, and a relay operably responsive to supply of current to said ringing circuit for opening said shunt circuit independent of a deposited coin, and means operable by actuation of said reverse current relay for operating said second-named relay.

7. In a pay telephone station, a talking circuit,

'8. In a pay teiepnone station including talking circuits and ringing circuits, a circuit normally shunting said talking circuit, switching means in said shunt circuit operably responsive to the deposit of a coin in said station for rendering said talking circuit effective, means in said'ringing circuit operably responsive to the ringing of said station for partially actuating said switching means, and means operable by the response of said station for completing the actuation of said switching mechanismto render said talking circuit effective independent of a coin.

9. In a pay telephone station including talking circuits and ringing circuits, a circuit normally shunting said talking circuit, switching means in said shunt circuit operably responsive to the deposit of a coin in said station for rendering said talking circuit effective, means in said ringing circuit operable by the ringing of said station by another station for partially actuating said switching means, and means operable by the response of said station while said other station is connected therewith for completing the operation of said switching means independent of a call.

10. In a pay telephone station including talking circuits and ringing circuits, a circuit normally shunting said talking circuit, switching means in said shunt circuit operablyresponsive to the deposit of a coin in said station for rendering said talking circuit efiective, means in said ringing circuit operable by the ringing of said station by another station for partially actuating said switching means, and means 'operable by the response of said station while said other station is connected therewith for completing the operation of said switching means independent of a call, and means for preventing complete operation of said switching means unless said station responds while said other station is connected therewith.

RALPH D. COLLINS; SYLVAIN F. CRANE. 

